Opening files Performance Issue

I have a network of 20 computers. We are using Office 2003 sp2 or sp3.
About 5 of them are experiencing issues when opening files (word, excel,
power point,

TXT, PDF, ETC). When a user opens a file though My Documents it doesn't
matter

if it's over the network or local. It can take 2-3 minutes for the file to
load and show.

If the user opens Word, Excel, Notepad, or Adobe though a shortcut (without
a file)

and then goes to file -> open & chooses a file it will open regularly.

The computers are identical to the ones w/o issue. They are 3.2gHz 1gb ram.
WinXP SP2,

The Server is Win03 SP1.


Any advice?